Earplug



FIG. 1 is a left, front-perspective view of an earplug;

FIG. 2 is a right, rear-perspective view of the earplug;

FIG. 3 is a right, side-view of the earplug, with the right, side-view being a mirror image thereof;

FIG. 4 is a rear-view of the earplug; and,

FIG. 5 is a front-view of the earplug. 

CLAIM The ornamental design for an earplug, as shown and described. 